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132 Commits

Author SHA1 Message Date
NIIBE Yutaka
dc13361524
dirmngr: Enable the call of ks_ldap_help_variables when USE_LDAP.
* dirmngr/server.c [USE_LDAP] (cmd_ad_query): Conditionalize.

--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2023-07-05 09:29:54 +09:00
Werner Koch
207c99567c
dirmngr: Extend the AD_QUERY command.
* dirmngr/server.c (cmd_ad_query): Add options --help and --subst.
(cmd_getinfo): Add sub-command "sid".
* dirmngr/ks-engine.h (KS_GET_FLAG_SUBST): New.
* dirmngr/ks-engine-ldap.c (ks_ldap_help_variables): New.
(getval_for_filter): New.
(map_rid_to_dn): New.
(ks_ldap_query): Support variables.
--

The new variables features makes it easier to write AD queries without
requiring domain specific expressions.
2023-06-07 10:03:48 +02:00
Werner Koch
56d309133f
dirmngr: Return modifyTimestamp and add server option --newer.
* dirmngr/server.c (cmd_ks_get): Add option --newer.
(cmd_ad_query): Ditto.
* dirmngr/ldap-misc.c (isotime2rfc4517): New.
(rfc4517toisotime): New.
* dirmngr/ks-action.c (ks_action_get): Add arg newer and pass on.
(ks_action_query): Ditto.
* dirmngr/ks-engine-ldap.c (extract_keys): Print new "chg" record.
(ks_ldap_get): Add arg newer.  Modify filter with newer arg.
(ks_ldap_search): Print the modifyTimestamp.
(ks_ldap_query): Add arg newer.  Modify filter with newer arg.
--

Note that the modifyTimestamp is also available on Windows, where its
value is more commonly known as whenChanged.  Both are constructed
attributes.

Note that the --newer option is a bit of a misnomer because LDAP has
only a greater-or-equal and no greater-than operator.
2023-04-04 08:49:55 +02:00
Werner Koch
625aeb65b0
dirmngr: New command AD_QUERY.
* dirmngr/dirmngr.h: Include name-value.h
(struct server_control_s): Add rootdse and rootdse_tried.
* dirmngr/dirmngr.c (dirmngr_deinit_default_ctrl): Release them.
* dirmngr/ks-engine.h (KS_GET_FLAG_ROOTDSE): Add two new flags.
* dirmngr/ks-engine-ldap.c: Include ks-action.h
(SERVERINFO_GENERIC): New.
(struct ks_engine_ldap_local_s): Add scope.
(ks_ldap_new_state): Set a default scope.
(ks_ldap_clear_state): Ditto.
(my_ldap_connect): Add flag generic.
(return_all_attributes): New.
(fetch_rootdse): New.
(basedn_from_rootdse): New.
(ks_ldap_get): Move some code out to ...
(ks_ldap_prepare_my_state): New.
(ks_ldap_query): New.
* dirmngr/ks-action.c (ks_action_parse_uri): Factored out from server.c
(ks_action_query): New.
* dirmngr/server.c (make_keyserver_item): Factored most code out to
ks_action_parse_uri.
(cmd_ad_query): New.
--

This command allows to query the Windows Active directory.
2023-03-20 19:24:49 +01:00
Werner Koch
f5347fbc25
dirmngr: Add framework to implement a fake CRL feature.
* dirmngr/fakecrl.c: New.
* dirmngr/dirmngr.h (opt): Add fake_crl.
* dirmngr/dirmngr.c (enum cmd_and_opt_values): Add oFakeCRL.
(opts): Add "fake-crl"
(parse_rereadable_options): Set opt.fake_crl.
* dirmngr/server.c (cmd_isvalid): Take care of fakce CRLs.
2023-03-16 14:52:28 +01:00
Werner Koch
56ca164684
dirmngr: Add command "GETINFO stats".
* dirmngr/server.c (cmd_getinfo): New sub-command "stats".
(dirmngr_status_helpf): Allow for a CTRL of NULL.
* dirmngr/certcache.c (cert_cache_print_stats): Add arg ctrl and use
dirmngr_status_helpf.  Adjust all callers.
* dirmngr/domaininfo.c (domaininfo_print_stats): Ditto.

* sm/certchain.c (ask_marktrusted): Flush stdout before printing the
fingerprint.
2023-03-10 11:24:48 +01:00
Werner Koch
b52a0e244a
dirmngr: Distinguish between "no crl" and "crl not trusted".
* dirmngr/crlcache.h (CRL_CACHE_NOTTRUSTED): New.
* dirmngr/crlcache.c (cache_isvalid): Set this status.
(crl_cache_cert_isvalid): Map it to GPG_ERR_NOT_TRUSTED.
(crl_cache_reload_crl): Move diagnostic to ...
* dirmngr/crlfetch.c (crl_fetch): here.
* dirmngr/server.c (cmd_isvalid): Map it to GPG_ERR_NOT_TRUSTED.
* dirmngr/validate.c (check_revocations): Handle new status.  Improve
diagnostics.
* common/status.c (get_inv_recpsgnr_code): Map INV_CRL_OBJ.
* common/audit.c (proc_type_verify): Ditto.
--

This avoids repeated loading of CRLs in case of untrusted root
certificates.
2023-03-09 18:28:39 +01:00
Werner Koch
b6abaed2b5
gpgsm: Print revocation date and reason in cert listings.
* dirmngr/ocsp.c (ocsp_isvalid): Add args r_revoked_at and
r_revocation_reason.
* dirmngr/server.c (cmd_isvalid): Emit a new REVOCATIONINFO status.
(cmd_checkocsp): Ditto.

* sm/call-dirmngr.c (struct isvalid_status_parm_s): Add new fields.
(isvalid_status_cb): Parse REVOCATIONINFO.
(gpgsm_dirmngr_isvalid): Add args r_revoked_at and
r_revocation_reason.

* sm/gpgsm.h (struct server_control_s): Add fields revoked_art and
revocation_reason.
* sm/keylist.c (list_cert_raw): Print revocation date.
(list_cert_std): Ditto.
--

Note that for now we do this only for OCSP because it is an important
piece of information when using the chain model.  For a sample key see
commit 7fa1d3cc821dca1ea8e1c80a0bdd527177c185ee.
2022-12-05 16:42:08 +01:00
NIIBE Yutaka
7011286ce6
dirmngr: Fix build with no LDAP support.
* dirmngr/server.c [USE_LDAP] (start_command_handler): Conditionalize.

--

GnuPG-bug-id: 6239
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2022-10-14 09:58:41 +09:00
Werner Koch
7a01e806ea
dirmngr: Support paged LDAP mode for KS_GET
* dirmngr/ks-engine-ldap.c (PAGE_SIZE): New.
(struct ks_engine_ldap_local_s): Add several new fields.
(ks_ldap_clear_state): Release them.
(search_and_parse): Factored out from ks_ldap_get and extended to
support the paged mode.
(ks_ldap_get):  Implement the pages mode for --first and --next.
* dirmngr/server.c (cmd_ks_get): Provide a dummy passphrase in --first
mode.
* dirmngr/Makefile.am (dirmngr_LDADD): Add LBER_LIBS.
--

The paged mode allows to retrieve more items than the servers usually
limit (e.g. 1000 for an LDS).  This patch also allows to use --first
without a patter to retrieve all keyblocks (except for disabled and
revoked keys).

GnuPG-bug-id: 6224
2022-10-05 15:15:14 +02:00
Werner Koch
4de98d4468
dirmngr: New options --first and --next for KS_GET.
* dirmngr/server.c (cmd_ks_get): Add option --first and --next.
(start_command_handler): Free that new ldap state.
* dirmngr/ks-engine-ldap.c (struct ks_engine_ldap_local_s): New.
(ks_ldap_new_state, ks_ldap_clear_state): New.
(ks_ldap_free_state): New.
(return_one_keyblock): New.  Mostly factored out from ....
(ks_ldap_get): here.  Implement --first/--next feature.

* dirmngr/ks-action.c (ks_action_get): Rename arg ldap_only to
ks_get_flags.
* dirmngr/ks-engine.h (KS_GET_FLAG_ONLY_LDAP): New.
(KS_GET_FLAG_FIRST): New.
(KS_GET_FLAG_NEXT): New.

* dirmngr/dirmngr.h (struct server_control_s): Add member
ks_get_state.
(struct ks_engine_ldap_local_s): New forward reference.
--

This feature allows to fetch keyblock by keyblock from an LDAP server.
This way tools can process and maybe filter each keyblock in a more
flexible way.  Here is an example where two keyblocks for one mail
address are returned:

  $ gpg-connect-agent --dirmngr
  > ks_get --ldap --first  <foo@example.org>
  [... First keyblock is returned ]
  OK
  > ks_get --next
  [ ... Next keyblock is returned ]
  OK
  > ks_get --next
  ERR 167772218 No data <Dirmngr>

GnuPG_bug_id: 6224
2022-10-04 12:44:29 +02:00
NIIBE Yutaka
598884699d
dirmngr: Fix for USE_LDAP.
* dirmngr/ks-action.c [USE_LDAP] (ks_action_help): Recover variables.
* dirmngr/server.c [USE_LDAP] (dirmngr/server.c): Likewise.

--

Fixes-commit: 3d7dbf16618db4d0dc602daadbde098d4a14b528
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2022-09-14 16:45:22 +09:00
NIIBE Yutaka
3d7dbf1661
agent,dirmngr,gpg,scd: Clean up for modern compiler.
* agent/protect.c (agent_get_shadow_info_type): It's a write only
variable, useful for debugging.
* g10/key-check.c (key_check_all_keysigs): Likewise.
* g10/keyedit.c (show_basic_key_info, menu_expire): Likewise.
* scd/app-sc-hsm.c (read_ef_prkd): Likewise.
* dirmngr/crlfetch.c (fetch_next_ksba_cert): Initialize the vars.
* dirmngr/ks-action.c (ks_action_help): Remove unused variables.
* dirmngr/server.c (make_keyserver_item): Likewise.
* dirmngr/validate.c (check_cert_sig): Initialize the variable.
* scd/app-p15.c (select_and_read_record): Likewise.
* tests/gpgscm/scheme.c (scheme_init_new): A function with no args.

--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2022-09-14 12:08:58 +09:00
Werner Koch
435861b9fb
dirmngr: Escape more characters in WKD requests.
* dirmngr/server.c (proc_wkd_get): Also escape '#' and '+'
--
GnuPG-bug-id: 5902
2022-03-28 16:12:03 +02:00
Werner Koch
92c8ae720e
dirmngr: Make WKD_GET work even for servers not handling SRV RRs.
* dirmngr/server.c (proc_wkd_get): Take care of DNS server failures
--

Unfortunately there are resolver setups which don't handle SRV records
but return a server error.  We let a not found error pass, because
that merely means the domain does not exists.

GnuPG-bug-id: 4729
2022-03-21 22:38:22 +01:00
Werner Koch
57d546674d
dirmngr: Avoid initial delay on the first keyserver access.
* dirmngr/dirmngr.c (dirmngr_never_use_tor_p): New.
* dirmngr/server.c (ensure_keyserver): Don't even test for the Tor
proxy in never-use-tor Mode.

* tools/gpgtar-create.c: Include unistd.h to avoid a warning on
Windows.
--

This delay of 2 or 3 seconds is in particular annoying on Windows.
This is now suppressed, as it should be, if --no-use-tor is used.

The second patch is unrelated
2022-02-01 16:03:06 +01:00
Werner Koch
d445e19365
dirmngr: Map all gnupg.net addresses to the Ubuntu keyserver.
* dirmngr/server.c (make_keyserver_item): Change mapping.
--

It turned out that having the old surfnet keyserver for unencrypted
connections is problematic because that server does not sync with the
Ubuntu server.

GnuPG-bug-id: 5751
2022-01-10 09:13:43 +01:00
Werner Koch
55b5928099
dirmngr: Change the default keyserver.
* configure.ac (DIRMNGR_DEFAULT_KEYSERVER): Change to
keyserver.ubuntu.com.

* dirmngr/certcache.c (cert_cache_init): Disable default pool cert.
* dirmngr/http-ntbtls.c (gnupg_http_tls_verify_cb): Ditto.
* dirmngr/http.c (http_session_new): Ditto.

* dirmngr/server.c (make_keyserver_item): Use a different mapping for
the gnupg.net names.
--

Due to the unfortunate shutdown of the keyserver pool, the long term
defaults won't work anymore.  Thus it is better to change them.

For https access keyserver.ubuntu.com is now used because it can be
expected that this server can stand the load from newer gnupg LTS
versions.

For http based access the Dutch Surfnet keyserver is used.  However
due to a non-standard TLS certificate this server can not easily be
made the default for https.

Note: that the default server will be changed again as soon as a new
connected keyserver infrastructure has been established.

(cherry picked from commit 47c4e3e00a7ef55f954c14b3c237496e54a853c1)
2021-08-24 18:09:56 +02:00
Werner Koch
864ea25198
dirmngr: Rewrite the LDAP wrapper tool
* dirmngr/ldap-misc.c: New.
* dirmngr/ldap-misc.h: New.
* dirmngr/ks-engine-ldap.c: Include ldap-misc.h.
(ldap_err_to_gpg_err, ldap_to_gpg_err): Move to ldap-misc.c.
* dirmngr/ldap-wrapper.c (ldap_wrapper): Print list of args in debug
mode.
* dirmngr/server.c (lookup_cert_by_pattern): Handle GPG_ERR_NOT_FOUND
the saqme as GPG_ERR_NO_DATA.
* dirmngr/ldap.c (run_ldap_wrapper): Add args tls_mode and ntds.
Remove arg url.  Adjust for changes in dirmngr_ldap.
(url_fetch_ldap): Remove args host and port.  Parse the URL and use
these values to call run_ldap_wrapper.
(attr_fetch_ldap): Pass tls flags to run_ldap_wrapper.
(rfc2254_need_escape, rfc2254_escape): New.
(extfilt_need_escape, extfilt_escape): New.
(parse_one_pattern): Rename to ...
(make_one_filter): this.  Change for new dirmngr_ldap calling
convention.  Make issuer DN searching partly work.
(escape4url, make_url): Remove.
(start_cert_fetch_ldap): Change for new dirmngr_ldap calling
convention.
* dirmngr/dirmngr_ldap.c: Major rewrite.

* dirmngr/t-ldap-misc.c: New.
* dirmngr/t-support.h (DIM, DIMof): New.
* dirmngr/Makefile.am (dirmngr_ldap_SOURCES): Add ldap-misc.c
(module_tests) [USE_LDAP]: Add t-ldap-misc.
(t_ldap_parse_uri_SOURCES): Ditto.
(t_ldap_misc_SOURCES): New.
--

This rewrite allows to properly handle TLS and avoids some code
duplication.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 39815c023f0371dea01f7c51469b19c06ad18718)
2021-06-16 12:58:32 +02:00
Werner Koch
58e4c82512
dirmngr: Fix default port for our redefinition of ldaps.
* dirmngr/server.c (make_keyserver_item): Fix default port for ldaps.
Move a tmpstr out of the blocks.
* dirmngr/ks-engine-ldap.c (my_ldap_connect): Improve diagnostics.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 8de9d54ac83fa20cb52b847b643311841be4d6dc)
2021-06-16 12:45:20 +02:00
Werner Koch
52cf32ce2f
dirmngr: New option --ldapserver
* dirmngr/dirmngr.c (opts): Add option --ldapserver.
(ldapserver_list_needs_reset): New var.
(parse_rereadable_options): Implement option.
(main): Ignore dirmngr_ldapservers.conf if no --ldapserver is used.

* dirmngr/server.c (cmd_ldapserver): Add option --clear and list
configured servers if none are given.
--

This option allows to specify LDAP keyserver in dirmngr instead of
using gpgsm.conf.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit ff17aee5d10c8c5ab902253fb4332001c3fc3701)
2021-06-16 12:42:02 +02:00
Werner Koch
eb3a629154
dirmngr: Allow for non-URL specified ldap keyservers.
* dirmngr/server.c (cmd_ldapserver): Strip an optional prefix.
(make_keyserver_item): Handle non-URL ldap specs.
* dirmngr/dirmngr.h (struct ldap_server_s): Add fields starttls,
ldap_over_tls, and ntds.

* dirmngr/ldapserver.c (ldapserver_parse_one): Add for an empty host
string.  Improve error messages for the non-file case.  Support flags.
* dirmngr/ks-action.c (ks_action_help): Handle non-URL ldap specs.
(ks_action_search, ks_action_get, ks_action_put): Ditto.
* dirmngr/ks-engine-ldap.c: Include ldapserver.h.
(ks_ldap_help): Handle non-URL ldap specs.
(my_ldap_connect): Add args r_host and r_use_tls.  Rewrite to support
URLs and non-URL specified keyservers.
(ks_ldap_get): Adjust for changes in my_ldap_connect.
(ks_ldap_search): Ditto.
(ks_ldap_put): Ditto.
--

The idea here is to unify our use of URLS or colon delimited ldap
keyserver specification.  The requirement for percent escaping, for
example the bindname in an URLs, is cumbersome and prone to errors.
This we allow our classic colon delimited format as an alternative.
That format makes it also easy to specify flags to tell dirmngr
whether to use starttls or ldap-over-tls.  The code is nearly 100%
compatible to existing specification.  There is one ambiguity if the
hostname for CRL/X509 searches is just "ldap"; this can be solved by
prefixing it with "ldap:" (already implemented in gpgsm).

GnuPG-bug-id: 5405, 5452
Ported-from: 2b4cddf9086faaf5b35f64a7db97a5ce8804c05b
2021-06-16 12:25:13 +02:00
Werner Koch
1c96f4d663
dirmngr: Support pseudo URI scheme "opaque".
* dirmngr/http.h (HTTP_PARSE_NO_SCHEME_CHECK): New.
* dirmngr/http.c (http_parse_uri): Use this flag.  Change all callers
to use the new macro for better readability.
(do_parse_uri): Add pseudo scheme "opaque".
(uri_query_value): New.
--

This scheme can be used to convey arbitrary strings in a parsed_uri_t
object.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 72124fadafde153f8ac89a70202006d831829d06)
2021-06-16 11:54:47 +02:00
Werner Koch
d7e707170f
gpg: Lookup a missing public key of the current card via LDAP.
* g10/getkey.c (get_seckey_default_or_card): Lookup a missing public
key from the current card via LDAP.
* g10/call-dirmngr.c: Include keyserver-intetnal.h.
(gpg_dirmngr_ks_get): Rename arg quick into flags.  Take care of the
new LDAP flag.
* g10/keyserver-internal.h (KEYSERVER_IMPORT_FLAG_QUICK): New.
Replace the use of the value 1 for the former quick arg.
(KEYSERVER_IMPORT_FLAG_LDAP): New.
* g10/keyserver.c (keyserver_get_chunk): Increase the reserved line
length.
* dirmngr/ks-action.c (ks_action_get): Add arg ldap_only.
* dirmngr/server.c (cmd_ks_get): Add option --ldap.
--

This change makes it easy to start working with gnupg: Just insert the
smartcard or token provided to you and the first time you sign a
message the public key associated with the current card will be
imported and everything is set without any configuration.

This works only with an LDAP directory because it can be expected that
the public key has been put into the LDAP during card personalization.
Of course an LDAP server needs to be configured; in a Windows AD
domain this can be a mere "keyserver ldap:///" in dirmngr.conf.  Other
configured keyservers are ignored.

Requirements for the card driver: The $SIGNKEYID attribute must exists
and a query for the KEY-FPR attribute needs to return the OpenPGP
fingerprint for that key.  This is currently supported for OpenPGP
cards and certain PKCS#15 cards.

Signed-off-by: Werner Koch <wk@gnupg.org>
2021-04-16 20:21:23 +02:00
Werner Koch
cc056eb534
dirmngr: Do not store the useless pgpSignerID in the LDAP.
* dirmngr/ks-engine-ldap.c (extract_attributes): Do not store the
pgpSignerID.
* g10/call-dirmngr.c (ks_put_inq_cb): Do not emit sig records.
--

The pgpSignerID has no use in the LDAP and thus don't store it.
David's idea back in 2004 was
              /* This bit is really for the benefit of people who
                 store their keys in LDAP servers.  It makes it easy
                 to do queries for things like "all keys signed by
                 Isabella".  */
See-commit: 3ddd4410aef928827e1c8d4fb02c1ccd3f8eaea5

I consider this dangerous because such a query is not able to validate
the signature, does not get revocation signatures, and also has no
information about the validity of the signatures.  Further many keys
are spammed tehse days with faked signatures and it does not make
sense to blow up the LDAP with such garbage.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-12-14 19:29:49 +01:00
Werner Koch
3cf9bb4d73
gpg-connect-agent: Catch signals so that SIGPIPE is ignored.
* dirmngr/server.c (cmd_killdirmngr): Return 0.
* tools/gpg-connect-agent.c (main): Catch signals.
--

And we also print nicer diagnostics.  The reason we need this is that
for example "gpgconf --kill dirmngr" uses gpg-connect-agent to send a
command to dirmngr.  This may results in a SIGPIPE which in turn leads
to an annoying error message from gpgconf.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-09-10 10:50:40 +02:00
Werner Koch
8a6ecc6ff5
dirmngr: Tell gpg about WKD looks resulting from a cache.
* dirmngr/server.c (proc_wkd_get): Print new NOTE status
"wkd_cached_result".
* g10/call-dirmngr.c (ks_status_cb): Detect this and print a not ein
verbose mode.
--

This little patch is helpful to see why a WKD change still does not
work after it has been updated on the server.

Signed-off-by: Werner Koch <wk@gnupg.org>
2019-12-06 20:04:56 +01:00
Werner Koch
914fa3be22
dirmngr: Support the new WKD draft with the openpgpkey subdomain.
* dirmngr/server.c (proc_wkd_get): Implement new openpgpkey subdomain
method.

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-11-13 11:35:39 +01:00
Andre Heinecke
678e4706ee
dirmngr: Add FLUSHCRLs command
Summary:
* dirmngr/crlcache.c (crl_cache_flush): Also deinit the cache.
* dirmngr/server.c (hlp_flushcrls, cmd_flushcrls): New.
(register_commands): Add FLUSHCRLS.

--
This allows it to flush the CRL cache of a running dirmngr
server. This can be useful to debug / analyze CRL issues.

GnuPG-Bug-Id: T3967

Differential Revision: https://dev.gnupg.org/D469

Signed-off-by: Andre Heinecke <aheinecke@intevation.de>
(cherry picked from commit 00321a025f90990a71b60b4689ede1f38fbde347)
2018-11-12 13:54:26 +01:00
Werner Koch
6b9f772914
common: Prepare for parsing mail sub-addresses.
* common/mbox-util.c (mailbox_from_userid): Add arg subaddress and
implement.  Change all callers to pass false for it.

* common/t-mbox-util.c (run_mbox_no_sub_test): New.
(run_filter): Add arg no_sub.
(main): Call new test and add option --no-sub.
--

Some stats: In the about 5300000 keys on the SKS servers we found 3055
unique mailboxes with a '+' in it.  After removing leading and
trailing '+' as well as multiple '+' (e.g. "c++" or "foo+bar+baz")
2697 were left which seem to be valid sub-addresses.

To filter mailboxes out from a line delimited list with
user-ids (e.g. an SQL output), the command

   t-mbox-util --verbose --filter

can be used; to output w/o sub-addresses add --no-sub.

GnuPG-bug-id: 4200
Signed-off-by: Werner Koch <wk@gnupg.org>
2018-11-12 07:44:33 +01:00
Werner Koch
256a280c51
dirmngr: Prepare for updated WKD specs with ?l= param
* dirmngr/server.c (proc_wkd_get): Tack the raw local address to the
request.
--

We append the raw non-canonicalized local address part to the hash.
Servers who serve the requests from static files will ignore the
parameters and a test with posteo shows that also services using a
database ignore the parameter.  The general idea is that service
providers may use their own canonicalization rules.  The problem is
that we currently filter the returned key for the full mail address
and thus we will never see a key if the service did a different
canonicalization than we.  So consider this to be an experiment.

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-10-22 20:13:08 +02:00
Werner Koch
ebe727ef59
dirmngr: Validate SRV records in WKD queries.
* dirmngr/server.c (proc_wkd_get): Check the returned SRV record names
to mitigate rogue DNS servers.
--

I am not sure wether this really is very useful because the security
relies on a trustworthy DNS system anyway.  However, that check is
easy enough to do.

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-07-27 12:24:23 +02:00
Werner Koch
bd4048c533
dirmngr: Print a WARNING status for DNS config problems.
* dirmngr/dirmngr-status.h: New.
* dirmngr/dirmngr.h: Include dirmngr-status.h and move some prototypes
to that file.
* dirmngr/t-support.c: New.
* dirmngr/Makefile.am (dirmngr_SOURCES): Add dirmngr-status.h.
(t_common_src): Add t-support.c.
* dirmngr/server.c (dirmngr_status_printf): Bypass if CTRL is NULL.
* dirmngr/dns-stuff.c: Include dirmngr-status.h.
(libdns_init): Print WARNING status line.  Change call callers to take
and pass a CTRL argument.
* g10/call-dirmngr.c (ks_status_cb): Print info for new WARNING
status.
--

To test this you can change RESOLV_CONF_NAME in dns-stuff.c and run
gpg --recv-key -v SOMETHING.

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-07-25 14:35:04 +02:00
Werner Koch
cc66108253
dirmngr: Fix handling of CNAMEed keyserver pools.
* dirmngr/ks-engine-hkp.c (map_host): Don't use the cname for HTTPHOST.
* dirmngr/server.c (make_keyserver_item): Map keys.gnupg.net.
--

For a description of the problem see the comment in
make_keyserver_item.

GnuPG-bug-id: 3755
Signed-off-by: Werner Koch <wk@gnupg.org>
2018-04-26 12:28:53 +02:00
Werner Koch
705d8e9cf0
dirmngr: Implement CRL fetching via https.
* dirmngr/http.h (HTTP_FLAG_TRUST_CFG): New flag.
* dirmngr/http.c (http_register_cfg_ca): New.
(http_session_new) [HTTP_USE_GNUTLS]: Implement new trust flag.
* dirmngr/certcache.c (load_certs_from_dir): Call new function.
(cert_cache_deinit): Ditto.
* dirmngr/http-ntbtls.c (gnupg_http_tls_verify_cb): Ditto.
* dirmngr/ks-engine-http.c (ks_http_fetch): Add new args
'send_no_cache' and 'extra_http_trust_flags'.  Change all callers to
provide the default value.
* dirmngr/crlfetch.c (crl_fetch): Rewrite to make use of
ks_http_fetch.
--

The old code simply did not use https for downloading of CRLS.
Instead it rewrote https to http under the assumption that the CRL
service was also available without encryption.  Note that a CRL is
self-standing and thus it does not need to have extra authenticity as
provided by TLS.  These days we should not use any unencrypted content
and thus this patch.

Be aware that cacert.org give a https CRL DP but that currently
redirects to to http!  This is a downgrade attack which we detect and
don't allow.  The outcome is that it is right now not possible to use
CAcert certificates.

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-04-25 12:38:04 +02:00
Werner Koch
460e3812be
dirmngr: Fallback to CRL if no default OCSP responder is configured.
* dirmngr/server.c (cmd_isvalid): Use option second arg to trigger
OCSP checkibng.  Fallback to CRL if no default OCSP responder has been
configured.
* sm/call-dirmngr.c (gpgsm_dirmngr_isvalid): Adjust accordingly.

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-04-24 11:40:51 +02:00
Werner Koch
bbb5bfacc0
agent,dirmngr: Add "getenv" to the getinfo command.
* agent/command.c (cmd_getinfo): Add sub-command getenv.
* dirmngr/server.c (cmd_getinfo): Ditto.
--

It is sometimes helpful to be able to inspect certain envvars in a
running agent.  For example "http_proxy".

Signed-off-by: Werner Koch <wk@gnupg.org>
2018-04-12 11:25:58 +02:00
Werner Koch
f19ff78f0f
common: Use new function to print status strings.
* common/asshelp2.c (vprint_assuan_status_strings): New.
(print_assuan_status_strings): New.
* agent/command.c (agent_write_status): Replace by call to new
function.
* dirmngr/server.c (dirmngr_status): Ditto.
* g13/server.c (g13_status): Ditto.
* g13/sh-cmd.c (g13_status): Ditto.
* sm/server.c (gpgsm_status2): Ditto.
* scd/command.c (send_status_info): Bump up N.
--

This fixes a potential overflow if LFs are passed to the status
string functions.  This is actually not the case and would be wrong
because neither the truncating in libassuan or our escaping is not the
Right Thing.  In any case the functions need to be more robust and
comply to the promised interface.  Thus the code has been factored out
to a helper function and N has been bumped up correctly and checked in
all cases.

For some uses this changes the behaviour in the error case (i.e. CR or
LF passed): It will now always be C-escaped and not passed to
libassuan which would truncate the line at the first LF.

Reported-by: private_pers
2018-02-14 12:21:44 +01:00
Werner Koch
f8e868d9df
dirmngr: Improve assuan error comment for cmd keyserver.
* dirmngr/server.c: Add error comment in case --resolve fails in
ensure_keyserver.
--

GnuPG-bug-id: 3756
Signed-off-by: Werner Koch <wk@gnupg.org>
2018-01-27 19:46:19 +01:00
Werner Koch
20b52be9ca
dirmngr: Check for WKD support at session end
* dirmngr/domaininfo.c (insert_or_update): Copy the name.
* dirmngr/misc.c (copy_stream): Allow arg OUT to be NULL.
* dirmngr/server.c (set_error): Protect CTX.
(dirmngr_status): Protect against missing ASSUAN_CTX.
(dirmngr_status_help): Ditto.
(dirmngr_status_printf): Ditto.
(cmd_wkd_get): Factor code out to ...
(proc_wkd_get): new func.  Support silent operation with no CTX.
(task_check_wkd_support): New.
--

This finalizes the feature to efficiently cache WKD checks.  If a
standard WKD query returns no data, we queue a test to be run after
the end of the session (so that we do not delay the calling client).
This check tests whether the server responsible for the queried
address has WKD at all enabled.  The test is done by checking whether
the "policy" file exists.  We do not check the "submission-address"
file because that is not necessary for the web key operation.  The
policy file is now required.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit d4e2302d8f4a1ff52d56da4f8e3a5d1c6303822d)
2017-12-11 11:31:15 +01:00
Werner Koch
f2997adee0
dirmngr: Add a background task framework.
* dirmngr/workqueue.c: New.
* dirmngr/Makefile.am (dirmngr_SOURCES): Add new file.
* dirmngr/server.c (server_local_s): New field session_id.
(cmd_wkd_get): Add a task.
(task_check_wkd_support): New stub function.
(cmd_getinfo): New sub-commands "session_id" and "workqueue".
(start_command_handler): Add arg session_id and store it in
SERVER_LOCAL.
(dirmngr_status_helpf): New.
* dirmngr/dirmngr.h (wqtask_t): New type.
* dirmngr/dirmngr.c (main): Pass 0 as session_id to
start_command_handler.
(start_connection_thread): Introduce a session_id and pass it to
start_command_handler.  Run post session tasks.
(housekeeping_thread): Run global workqueue tasks.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 96a4fbecd1acf946dcde20bef4752c539dae196b)
2017-12-11 11:30:45 +01:00
Werner Koch
6c1dcd79cf
dirmngr: Keep track of domains used for WKD queries
* dirmngr/domaininfo.c: New file.
* dirmngr/Makefile.am (dirmngr_SOURCES): Add file.
* dirmngr/server.c (cmd_wkd_get): Check whether the domain is already
known and tell domaininfo about the results.
--

This adds a registry for domain information to eventually avoid
useless queries for domains which do not support WKD.  The missing
part is a background task to check whether a queried domain supports
WKD at all and to expire old entries.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 65038e6852185c20413d8f6602218ee636413b77)
2017-12-11 11:27:22 +01:00
Werner Koch
fd68bdb61e
dirmngr: Auto-enable Tor on startup or reload.
* dirmngr/dirmngr.c (dirmngr_use_tor): Test for Tor availibility.
--

GnuPG-bug-id: 2935
Signed-off-by: Werner Koch <wk@gnupg.org>
2017-07-26 10:58:15 +02:00
Werner Koch
e975482239
dirmngr: Print a SOURCE status for WKD requests.
* dirmngr/server.c (cmd_wkd_get): Print a SOURCE status.
--

This status allows to see whether the the WKD requests has been
resolved from the standard address or from a SRV record derived one.
We return only host and port and not the .well-known suffix because
that is obvious.  HTTP redirects are not taken in account because they
may chnage at any time due to load balancing etc and not relevant for
gpg which may use the URL to detect changes in the WKD results.

For example my current setup returns

    S SOURCE https://wkd.gnupg.org

for wk@gnupg.org.  Without a SRV record

    S SOURCE https://gnupg.org

would have been returned.

Signed-off-by: Werner Koch <wk@gnupg.org>
2017-07-24 20:09:52 +02:00
Werner Koch
9b88cfa096
dirmngr: New function dirmngr_status_printf.
* dirmngr/server.c (dirmngr_status_printf): New.

Signed-off-by: Werner Koch <wk@gnupg.org>
2017-07-24 20:09:52 +02:00
Werner Koch
957f8ebc89
dirmngr: Fix license note in server.c
--

This double license note was accidentally added while only wanting to
add another copyright line.

Fixes-commit: 3419a339d9c4e800bf30e9021e05982d8c1021c1
Signed-off-by: Werner Koch <wk@gnupg.org>
2017-07-12 12:37:16 +02:00
Werner Koch
3419a339d9
Change license of some files to LGPLv2.1.
* COPYING.LIB: Rename to COPYING.LGPL3.
* COPYING.LGPL21: New.
* COPYING.GPL2: New.
* Makefile.am: Distribute them.
* AUTHORS: Update license pointers.  Add BSI as copyright holder.
* common/compliance.c, common/compliance.h: Add BSI copyright notice.
Break overlong lines.
* dirmngr/loadswdb.c: Add BSI copyright notices.
* dirmngr/server.c: Ditto.
* tools/call-dirmngr.c: Change license to LGPLv2.1.  Add BSI
copyright notice.
* tools/call-dirmngr.h: Ditto.
* tools/gpg-wks-client.c: Ditto.
* tools/gpg-wks-server.c: Ditto.
* tools/gpg-wks.h: Ditto.
* tools/mime-maker.c: Ditto.
* tools/mime-maker.h: Ditto.
* tools/mime-parser.c: Ditto.
* tools/mime-parser.h: Ditto.
* tools/send-mail.c: Ditto.
* tools/send-mail.h: Ditto.
* tools/wks-receive.c: Ditto.
* tools/wks-util.c: Ditto.
* tools/rfc822parse.c, tools/rfc822parse.h: Change license to LGPLv2.1.
--

For better deployment it seems to be better to make the Web Key
Directory code more easily available.

Some code was been developed under contract of the BSI.

Signed-off-by: Werner Koch <wk@gnupg.org>
2017-06-19 12:42:13 +02:00
Werner Koch
9b43220b8a
dirmngr: Implement HTTP connect timeouts of 15 or 2 seconds.
* dirmngr/dirmngr.c (oConnectTimeout, oConnectQuickTimeout): New
enums.
(opts): New options --connect-timeout and --connect-quick-timeout.
(DEFAULT_CONNECT_TIMEOUT): New.
(DEFAULT_CONNECT_QUICK_TIMEOUT): New.
(parse_rereadable_options): Handle new options.
(post_option_parsing): New.  Use instead of direct calls to
set_debug() and set_tor_mode ().
(main): Setup default timeouts.
(dirmngr_init_default_ctrl): Set standard connect timeout.
* dirmngr/dirmngr.h (opt): New fields connect_timeout and
connect_quick_timeout.
(server_control_s): New field timeout.
* dirmngr/ks-engine-finger.c (ks_finger_fetch): Pass timeout to
http_raw_connect.
* dirmngr/ks-engine-hkp.c (send_request): Call
http_session_set_timeout.
* dirmngr/ks-engine-http.c (ks_http_fetch): Ditto.
* dirmngr/server.c (cmd_wkd_get, cmd_ks_search, cmd_ks_get)
(cmd_ks_fetch): Implement --quick option.
--

The standard connect timeouts are way to long so we add a timeout to
the connect calls.  Also implement the --quick option which is already
used by gpg for non-important requests (e.g. looking up a key for
verification).

Signed-off-by: Werner Koch <wk@gnupg.org>
2017-06-08 09:37:36 +02:00
NIIBE Yutaka
5c8fe54809 Spelling fixes in docs and comments.
--

In addition, fix trailing spaces in tests/inittests.

GnuPG-bug-id: 3121
Reported-by: ka7 (klemens)
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2017-04-28 10:06:33 +09:00
NIIBE Yutaka
70aca95d68 Remove -I option to common.
* dirmngr/Makefile.am (AM_CPPFLAGS): Remove -I$(top_srcdir)/common.
* g10/Makefile.am (AM_CPPFLAGS): Ditto.
* g13/Makefile.am (AM_CPPFLAGS): Ditto.
* kbx/Makefile.am (AM_CPPFLAGS): Ditto.
* scd/Makefile.am (AM_CPPFLAGS): Ditto.
* sm/Makefile.am (AM_CPPFLAGS): Ditto.
* tools/Makefile.am (AM_CPPFLAGS): Ditto.
* Throughout: Follow the change.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2017-03-07 20:25:54 +09:00